How light travel differently than sound?
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How light travel differently than sound?
Light waves and sound waves are both types of mechanical waves. However, there are some key differences between the two. For example,light waves travel faster than sound waves. Additionally,Light waves can travel through a vacuum, while sound waves cannot. Finally, light waves can be polarized, while sound waves cannot.
The speed of light
The speed of light is much faster than the speed of sound. It travels at approximately 186,000 miles per second, while sound travels at approximately 1,100 feet per second. Therefore, light can travel around the world seven and a half times in the time it takes for sound to travel one foot.
The speed of sound
The speed of sound is much slower than the speed of light. Sound waves travel through the air (or any medium), whereas light waves travel through the vacuum of space. It takes time for the sound wave to compress and decompress the air molecules as it travels. This is why we see lightning before we hear thunder.
How light waves travel
Light waves are a type of electromagnetic radiation, which means they travel by oscillating electric and magnetic fields. This differs from how sound waves travel, which is through the vibration of air particles. Because light waves do not need a medium to travel through, they can travel through the vacuum of space.
The speed of light is always the same, about 186,282 miles per second (299,792 kilometers per second). This is much faster than the speed of sound, which is about 1,087 feet per second (331 meters per second) in air.
How sound waves travel
Sound waves are compressional waves, which means they travel by compression and rarefaction of the medium through which they are traveling. The speed of sound is thus determined by the properties of the medium.
In a medium such as air, compression waves are created by variations in air pressure. These pressure variations cause the air molecules to banging together. These vibrations don’t travel very far before they run out of energy and dissipate.
Light waves, on the other hand, are electro-magnetic waves, which means they travel by oscillating electric and magnetic fields. These oscillations cause the wave to travel at the speed of light, which is much faster than the speed of sound.
The difference in wavelength
One of the key ways that light and sound differ from one another is in wavelength. Wavelength is the distance between two identical points in two consecutive waves. In other words, it’s the measure of how long a wave is. Light waves are much shorter than sound waves, which is why we can see objects that are far away but can only hear sounds that are close by.
The other key difference between light and sound is in how they travel. Sound waves need a medium to travel through, such as air, water, or metal. Light waves, on the other hand, do not need a medium to travel through. They can travel through a vacuum, which is why we can see stars and planets that are billions of miles away!
The difference in frequency
Light and sound are both forms of energy that travel through the air, but they differ in how they move. Light is made up of tiny particles called photons, while sound is made up of waves. This means that light can travel much faster than sound.
Sound waves move more slowly than light because they need to compress and rarefy the air as they travel. This takes time and energy, which is why sound waves can only travel at around 343 meters per second. Light waves, on the other hand, don’t need to compress the air around them, so they can travel much faster – around 300 million meters per second!
Another difference between light and sound is their frequency. Frequency is how often a wave vibrates in a given period of time. Sound waves have a low frequency, which means they vibrate slowly. This is why we can only hear sounds that have a frequency between 20 Hz and 20 kHz. Light waves have a much higher frequency than sound waves, which is why we can see things that emit light but we can’t hear them!
The difference in amplitude
The difference in amplitude is one of the main ways that light and sound differ from each other. Light waves have a much higher amplitude than sound waves, which means that they carry more energy. This difference is due to the fact that light waves are created by vibrating particles, while sound waves are created by vibrating molecules.
The difference in phase
There are two things that need to be understood in order to see how light and sound differ in their behaviors. The first is the concept of a wave, and the second is the difference in phase between light waves and sound waves.
A wave is created when something vibrates. The vibrations cause disturbances in the surrounding medium (like air or water) and these disturbances travel away from the source of the vibration. The disturbance caused by the vibration is called a wavefront. When you look at a wave, you will see that it has a crest (the highest point) and a trough (the lowest point). The distance between successive crests or troughs is called the wavelength.
Now let’s look at how light waves and sound waves differ in their behavior. Both light waves and sound waves travel through mediums (like air or water), but they travel at different speeds. Light waves always travel faster than sound waves. This difference in speed means that light waves will always reach your eye before sound waves will reach your ear.
But there’s another important difference between these two types of waves: their relationship to the medium through which they are traveling. Light waves do not need a medium in order to travel—they can move through empty space. Sound waves, on the other hand, cannot travel through empty space—they need a medium (like air or water) in order to move.
So, when you see lightning and then hear thunder, you are actually seeing and hearing two different things: first the lightning (a flash of light), then the thunder (the sound made by the lightning). The lightning travels faster than the thunder, so you see it first and then hear it second.
The difference in polarization
Light waves and sound waves are both forms of energy that travel through the air (or any other medium), but they differ in some important ways. For one thing, sound waves are longitudinal waves, meaning that the vibration that creates them occurs in the same direction that the wave is moving. Light waves, on the other hand, are transverse waves, meaning that the vibrations occur at right angles to the direction of the wave.
Another important difference is that sound waves are always polarized in one plane (the x-y plane), while light waves can be polarized in multiple planes. When a light wave is polarized in a particular plane, it means that the electric and magnetic fields that make up the wave are oscillating in that plane.